Pressed glass structure.



' its surfaces.

faces. have various forms, ltake the form of corrugatlon or ribs, be-

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aatented Apr. fat, 191%.

Application nieuwe 15,1sg9. Vsemana.502,378.

To HH ati/mmf 'it may concern y Be itknown that I, O'ris A. MYoA'rr, a citizen oft'l thellnited States, residing at few York, in the county of New York and State of New York, have invented. certain new and useful Improvements in lPressed Glass Structures, of which the following is a specification. reference being; had therein to the act'zompanyiug drawings.

The object or' my invention is to combine thc .advantages of the useful qualities of, silrered glass with the sparkle and brllliancy of glass having protuberances upon 'My .inventionis particularly applicable to reflectors for artificial. light. s

At present. thereare numerousforms. of silvered blown glass reflectors withv smooth and corrugated surfaces, but these cannot bc made to give'rich, sparkling effects, because in blown glass, both surfaces; follow the same outline. In. order to get the sparkling effects which are the object ofeth'is inventioir, the two surfaces which face each other through .the thickness of the glass must not conform in outline.

In my present invention I make,` use of4 transparent glass inclosures, having protuberances 4on both surfaces, 'and .havingr a specular metallic coating on one of thev sur- Althoug'h thev protuberances may I prefer that they' shall cause ythese are more convenient to make. The protuberanes, whatever their form, according to my invention, are so disposed that those en .ftheopposite surfaces of the glass are4 out of line. If they are corrugations or ribs, they may be said to be out of parallel. All the light rays on the one side which enter the glass' are refracted by th'e protuberances on thatsurface and are reflected back bythe metallic.coating` on the opposite surface, passing' through other refracting surfaces, so,that the light rays emitter'.I from the y 4present protuberances mustl be twice refracted and twice reflected y where the silvercd surface has suitable protuberances. f-

Figines l and 2 are plan views of reflectors embodying' my in-vention. j l

Fig'. l isa plan. view of a modification sliowing thevlfconventional double-reflecting prismatic reflector 'haring' a. coating of silver or other specular backing applied at e ing` f ner surface.

-artificial light source,.,

the purpose set forth.` Fig. 2 is aplan View of a further modification having ribs on the outer surface backedby the mirrored coatand;having prismatic ribs onthe in- The shape of the reflector may be that of a cone or an inverted bowl, or any known shape for reflectors for artificial lights. The lines of the ribs'yon the inner and outer surfacesy arenot parallel. Then such a reflector is placed over or around an the rays from the source will pass first through the transparent pressed. corrugations on the inner surface which are intended to refra-ctthem at different angles, and then 'after passing through the transparent body ofthe glass they will strike the specular metallic reflecting coat-ing on theoutcr surface where .they are reflected, and then strike other parts lof the orrugations on thc inner sur` face at different angles.

The disagreeable 'glare and streaks given by the modern high efficiency electric and other lamps are avoided when used with silvered reflectors made according,r to the invention described herein. lThis glare is avoided to a greater degree than is the case with ordinary glass reflectors having tljieir outer surface silvered, even when such reflectors are of blown, corrugated glass, for the reason already stated that where the curves on the' outer and inner surface conform 'to one another, there is practically very little diversion of the light rays from their directed VhiIeI prefer to make glass articles em bodying my invention by pressing, `it is to be understood that I do not restrict myself to this mode of manufacture, since l may also make the said articles by molding, rolling or other well known method.

Having described my invention what I claim is:

A body of transparent glass backed on one side by a ribbed silvercd coatingr and haringY opposite thereto ribbed light diffus# ing media, the ribbed surface of which is out of parallel with the ribbed silver-coated side.

In testimony whereof l allix my. signature iu presence of' two witnesses.

' OTIS A. M YGATT. ll'itnesscs: l

Join. B. LnIsEkMAN, lluxnlrr P. RAY. 

